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Updated on: 10 Aug 2019, 23:00

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Hi Guys

GMAT is standardized test which is quite different from exams taken at school/undergraduate level.It requires a lot of efforts to ace the test. In fact we need to act smartly, Regularity in studies is the basic key to success.What I feel the most important strategy is to make error logs to remember what the mistakes committed earlier.In fact trust me, If one can avoids the mistakes committed during the preparation in the real GMAT, one can easily get 700+.Now onward, Whenever I come across any good concepts/ traps , I will post it here. this will serve as a error logs for me and for other GMAT aspirants.you are also welcome to post your selected concepts/error/traps here.

(PS: It is not the exhaustive study notes/theory, but only errors/new concepts encountered)
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16 Apr 2018, 16:12

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Key concept: In any Trapezium, the area of opposite triangles formed by intersection of diagonals and non parallel side are equal. but the other 2 triangles with parallel sides are NOT equal, they would be equal in case of Parallelogram.

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16 Apr 2018, 16:27

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This is a simple concept, but the question framed on these are generally tricky:

1) If \(a^2+b^2 =c^2\), it means the angle between a & b is 90 deg, hence the triangle is right.2) If \(a^2+b^2 < c^2\), it means the angle between side a & b is obtuse, the triangle is obtuse.3) If \(a^2+b^2 > c^2\), it means the angle between a & b is acute, but since other angle can be obtuse, the triangle cant be taken as acute.

Attachment:

How to decide Acute or obtuse angle in a triangle.jpg [ 129.75 KiB | Viewed 2736 times ]

Out of above three, third property is MOST IMPORTANT.Please note that If \(a^2+b^2 > c^2\), it simply tells that angle between a and b is acute, it doesn't mean that the triangle is Acute angled triangle.

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17 Apr 2018, 04:00

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gmatbustersYou are doing great man. These nuances will surely help you to avoid traps and to improve the score above 700. Maybe these kind of things make this forum unique from other GMAT forums. If I come across such concepts, then I will keep posting on this thread.+1 to you
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03 Dec 2019, 01:52

Approach to find whether an expression is EVEN or ODD

It is a 3 step process:

1. \(n^x\) has the same Even and Odd nature as a \(n\) itself so always ignore the power it doesn't matter whether power \(x\) = 2, 3, 100 or so no provided that x is a positive integer.Always ignore/delete the exponent provided that exponent is a positive integer.

2. Ignore/delete the term which u know is an Even number.

3. if the coefficient of n is odd integer, just ignore the coefficient and write it as n only for simplicity, if the coefficient of n is Even, ignore/delete the complete term as it is Even

Example Question:

Which of the following expressions yields an even integer for any integer n?